I have not given an update in a couple of weeks. My last flight was June 4th and after I returned to the airport, I removed my air box, carburetor and carb to intake mount. The carb to intake pipe was designed for the EFS-2 and was made from 1 1/2 OD tubing. The EFS-3 has a much larger throat so the new intake tubing is now 2" OD. The previous one was restricting air flow from the carb to the intakes. The old one was made from steel tube, the new one is from 6061 aluminum and weighs about 1/3 of what it used to. Also, I installed a port for the newly installed manifold pressure gauge. The air box I had was insufficient for the larger EFS-3 carb plus I was sucking air from inside the cowl. The new box I am making is similar to Marl Langford's design. I am also having to modify the bottom of my cowl to make room for the new air box since the cowl was too tight for it to fit in. Hopefully, everything will be done by this weekend so I can get back in the air and report on my improved performance, at least I hope it will be improved.
Mark Jones (N886MJ) Wales, WI Visit my web site: http://mywebpage.netscape.com/n886mj Email: flyk...@wi.rr.com
